MGI:5604241 http://identifiers.org/mgd/MGI:5604241 TRE-Fgfr31c(R248C)-c-myc TRE-caFgfr1-myc Tg(tetO-Fgfr3*R248C/Fgfr1)#Dor Constitutively active|Inserted expressed sequence TRE-caFgfr1 transgene insertion, David M Ornitz